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Message: <blockquote data-quote="Lasherž" data-source="post: 8704657" data-attributes="member: 679555"><p>If it's at 12V resting when off, that's hardly the time to start playing music on top of it, it should be 12.4-13v if it's still doing okay. Voltage drops when you put a high current load on the battery also there's usually a voltage drop from under the hood to the trunk of .3 or .4v so you're saying you've got 11.6v before music starts.. yeah I can see why the amp wouldn't like that. If you've got a 5000W RMS amp and don't have a substantial battery bank then the days of playing music with your car off are over (unless you at the minimum want to drag out a battery charger while you do it). Alternators aren't really designed to constantly pick up the charging you missed out on by not having the car on while you killed the battery, they're better suited to just top the battery off between small drains.</p></blockquote><p></p>

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